Spring-hinge



(Model.)

J. R. PAYSON, J1.

SPRING HINGE.

No. 404,554. Pmnted June 4, 1889..'

' i UNITED STATES PATENT OFFICE.

JOSEPH R. PAITSON, JR., OF CHICAGO, ILLINOIS.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 404,556, dated June 4,1889. Application filed November 6, 1888. Serial No. 290,099. (Model.)

To all whom. it may concern."

Be it known that I, JOSEPH R. PAYSON, Jr., a citizen of the UnitedStates, residing in Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement in Butts for Doors,of which the following is a specification.

v, This invention relates to that c lass of hinges or butts for doors inwhich the force of a spring or springs is employed to draw the membersof the butt toward each other and into the position which they occupywhen the door is closed.

The primary object of the invention is to provide a butt of this classwhich shall have a central pivot, and in which may be secured the sameaction on the part of the spring-to wit, an action by which the door isclosed or yieldingly held in its closed position.

The invention also embraces a centrallypivoted butt containing severalfeatures of the spring-hinge above referred to, but wanting the spring,the same being adapted to be used as the lower hinge of a door inconnection with a similar hinge having a spring for the upper part ofthe door. Y,

Referring to the accompanying drawings for a fuller explanation of theinvention, Figure lis a side view of a Vportion of a door and the doorframe or casing provided with my improved butt. Fig. 2 is a' centralvertical sectional view of the same. Fig. 3 is a horizontal sectionalView taken upon line 3 3 of Fig. l. Fig. 4 is a horizontal sectionalview taken upon line 4. 4 of Fig. l immediately below the section-lineof Fig. 3. Fig. 5 is a vertical transverse sectional view taken uponline 5 5 of Fig. 3. Fig. 6 is a horizontal sectional View taken uponline 3 3 of Fig. l, reduced somewhat in size for convenience indrafting, and showing the door open and in position at right angles tothe door frame or casing.

A is the door, and C the door frame or casing.

I3 is one member of the butt, and J the other. The member B is shown asa housing or case adapted to be applied to the edge of the door A, sothat its outer faces will lie flush with the side faces of the door,that portion of the door covered by said member being cut away, asclearly shown in Fig. 2. Within the hollow member B is a vertical pivotor pin P, sustained in the upper and lower end plates of said member andlocated about midway of the thicknessof the door. The other member J isshown let into the frame or casing so as to be flush with'its face, asseen in Fig. 3, and is provided with two fiat horizontal projecting lugsD D', Fig. l, which enter suitable slots or openings in the adjacentpart of the member B. Each of the lugs D D is provided with an elongatedslot or opening so, through which the pivotpin P passes, as clearlyshown in Fig. 4. The member Bis provided upon its opposite sides withprojecting ears or cams e e e e', one pair being shown at each end ofthe member, and the member J is provided with friction-roll` ers ff inposition to bear against the curved edges of said cams.

These friction-rollers g are pivoted on the vertical pivots g g, and

the door frame or casing C is cut awaytovaccomniodate them, as clearlyshown in Figs. `Il and 3. A single pair of cams and a single roller willserve as well, and will be preferal bly located midway of the height ofthe butt.

Loosely surrounding the pivot P are two shouldered collars t and(rand-between these collars is a coiled torsional spring S, alsosurrounding the pivot,vand having its endsse- ,1

cured to said collars, respectively. Apin fm, secured to the uppercollar t, projects upwardly therefrom and engages a hole or slot p inthe upper lug D of the member J. Interposed between the collar o and thelower lug D, and also surrounding the pivot P, is a third collar t,which is provided with a downwardly-projecting pin m', engaging a holeor slot p in the lower lug D. The face of the collar o adjacent to thecollarl is provided with a series of half-round radial notches, and inthe adjacent face of the collar t is provided a single similar notch.Together these registeringnotches form a hole a, adapted to receive apin n. When said pin n is inserted, (as clearly shown in Figs. 2 and 5,)the two collars o and t are united together, so that a rotary movementof the one upon the pivot P also produces a rotary movement of theother. Holes or openings d are provided in the periphery of the collar oto receive a lever, so that when IOO it is desired to increase or lessenthe tension of the spring S the lever maybe inserted and the straintaken off the pin n. The latter may then be removed from the coincidingnotches a occupied by it and reinserted after another notch in 0 hasbeen brought to register with that in the collar t,

It will be observed that the spring S, while located in the member B, isattached at its ends to the lugs D D of the member J, and thus exerts aconstant force in drawing the two members B and J toward each other, orto the position they have when the door is closed. The cams c e havingtheir shortest radii in the central plane of the door, the opening ofthe door in either direction withdraws the projections D D more or lessfrom within the opposite member of the butt and carries the centralpivot P outward in the slots of said projections. This movement of thepivot being resisted by the spring S, the door, when released, is drawnback by said spring to its closed position. (Illustrated in Fig. 5.) Thetension of the spring S of the upper butt must of course be sufficientto draw the members into contact with each other. The weight of the doorwill bear the members of the lower butt together, and the spring may,ifdesired, be omitted therefrom.

l\[anifestly various modifications may be made in the details ofconstruction without departure from the invention, which is set forth inits several features in the following claims.

I claim- 1. A door-butt comprising two members, one for attachment to adoor and the other for attachment to a door-frame, one or more outwardprojections upon one of the members, a spring arranged to force the twom em.- bers toward each other, and a pivot located substantially midwayof the thickness of the door and engaging openings in both the saidprojection or projections and the other member, the opening or openingsin one or both of said parts being larger than the pivot, substantiallyas described.

2. A butt for a lower part of a door, compri'sin g two members forattachment, one to the door and the other to the door-frame, one or moreoutward projections upon one of the members, and a pivot locatedsubstantially midway of the thickness of the door and engaging openingsin both the said projection or projections and the other member, theopenin g or openings in one or both said parts being a slot.,substantially as described.

3. The combinatiomwith the two members of the butt, one of which isprovided with an outward projection or projections, of a centralvert-ical pivot engaging the projection or projections and the othermember by holes which in one or both are in oblong form, and a coiledtorsion-spring surrounding the pivot and engaged with the severalmembers, so that its force is exerted to draw the members toward eachother, substantially as described.

4L. In a centrally-pivoted butt, horizontal lateral extensions or camsupon one of the members having curved outer edges, and a spring arrangedto draw the members toward each other.

5. In a centrally-pivoted butt, the horizont-al lateral extensions orcams upon one of the members having curved edges, one or morefriction-rollers upon the other member arranged to bear upon the curvedfaces of said cam-extensions, and a spring arranged to draw the membersof the butt toward each other.

G. The combination, with the two membersI of a butt, of a central pivotattached to one of said members and having a bodily movement toward andfrom the other, and a spring engaged with the pivot and also with themember with respect to which said pivot is movable.

JOSEPII R. PAYSON, JR. XV i tnesscs:

FRED YGuarnieri, GHAs. SHERVEY.

